Mr Sism, like the way you're thinking, but sorting the ASX 200 by market cap today the 100th ranked company is around the $1.7B mark, I think the new SLR might still be a fair bit short of that, on today's price around $1.2B.
I would think the removal of Integra and the any re-weighting of SLR due to increased size would balance out on the IGR shares being effectively converted to SLR shares; i.e. the $ any index fund has in Integra will end up as roughly the same amount of $ in SLR, but I don't say that with any authority, just a guess.
SLR Price at posting:
$3.29 Sentiment: Hold Disclosure: Held